Design and test of a prototype scale ejector wing

A two dimensional momentum integral analysis was used to examine the effect of changing inlet area ratio, diffuser area ratio, and the ratio of ejector length to width. A relatively wide range of these parameters was considered. It was found that for constant inlet area ratio the augmentation increases with the ejector length, and for constant length: width ratio the augmentation increases with inlet area ratio. Scale model tests were used to verify these trends and to examine th effect of aspect ratio. On the basis of these results, an ejector configuration was selected for fabrication and testing at a scale representative of an ejector wing aircraft. The test ejector was powered by a Pratt-Whitney F401 engine developing approximately 12,000 pounds of thrust. The results of preliminary tests indicate that the ejector develops a thrust augmentation ratio better than 1.65

Some Observations Concerning the Evaporation Metals from Hot Filaments

For effective evaporation of metals from hot filaments, the metal to be evaporated, if different from the filament substance, must wet and cling to the hot filament used. A number of filament materials have been tried and the metals which wet each are reported

Framing The Polemics of the Intersection of Immigration and Health Care in the United States: an Ethnographic and Theoretical Contribution to a Discussion on the Biopolitics of Exclusion

The Patient Protection and Affordable Care Act (PPACA) was signed into law by President Obama on March 23, 2010 and has slowly been implemented over the past two years. If the President’s health care reform legislation continues to move forward we will see tens of millions of Americans gain health insurance and access to medical care at more affordable prices than before, yet due to some of the provisions of the ACA, almost 12 million people living in the United States will see no change to their access to health care. These habitants, most of them employed, come from outside the U.S., and therefore are defined as non-citizens by their immigration status. As a result, all undocumented immigrants and many legal residents will find themselves in a minority of American workers without the same rights and access to basic health needs. Using a multi-faceted approach to study the intersection of immigration and health care, this paper combines ethnographic interviews with immigrant small business owners in West Philadelphia with a literature review of the history of immigration reform and the theories behind the social concepts of political exclusion, framing, structural violence, and biopower. In the conclusion, explanations will be given for the continued biopolitical exclusion of immigrants in the U.S. and suggestions will be supplemented on how this country may be able to change its policy to one day have true universal health care coverage

Wetting of Hot Metal Filaments by Molten Metals

In making thin films of metal by evaporation it is often convenient to evaporate the metal from an incandescent metal filament. In order that evaporation may take place properly the molten metal being evaporated must wet the incandescent filament. The work previously reported on the wetting of metal filaments by molten metals has been extended to include tantalum as a filament material. This report brings the work up to date. It includes the following metals as filament materials: nickel, platinum, molybdenum, tantalum, and tungsten. The following metals were evaporated from the molten state: aluminum, silver, gold, copper, nickel, chromium, and platinum

Patient Preference for Light‐Cured Composite Bite Splint Compared to Heat‐Cured Acrylic Bite Splint

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141547/1/jper1108.pd

Anisotropic constitutive modeling for nickel base single crystal superalloy Rene N4 at 982 C

A back stress/drag stress constitutive model based on a crystallographic approach to model single crystal anisotropy is presented. Experimental results demonstrated the need for the back stress variable in the inelastic flow equations. Experimental findings suggested that back stress is orientation dependent and controls both strain hardening and recovery characteristics. Due to the observed stable fatigue loops at 1800 F, drag stress is considered constant for this temperature. The constitutive model operated with constraints determined only from tensile data was extensively tested from simple tensile and fatigue to complicated strain hold tests. The model predicted very well under those conditions

Human Histological Research: Is It Necessary? Humane? Ethical?

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142189/1/jper1207.pd

Dominance of grain size impacts on seasonal snow albedo at deforested sites in New Hampshire

Snow cover serves as a major control on the surface energy budget in temperate regions due to its high reflectivity compared to underlying surfaces. Winter in the northeastern United States has changed over the last several decades, resulting in shallower snowpacks, fewer days of snow cover, and increasing precipitation falling as rain in the winter. As these climatic changes occur, it is imperative that we understand current controls on the evolution of seasonal snow albedo in the region. Over three winter seasons between 2013 and 2015, snow characterization measurements were made at three open sites across New Hampshire. These near-daily measurements include spectral albedo, snow optical grain size determined through contact spectroscopy, snow depth, snow density, black carbon content, local meteorological parameters, and analysis of storm trajectories using the Hybrid Single-Particle Lagrangian Integrated Trajectory model. Using analysis of variance, we determine that land-based winter storms result in marginally higher albedo than coastal storms or storms from the Atlantic Ocean. Through multiple regression analysis, we determine that snow grain size is significantly more important in albedo reduction than black carbon content or snow density. And finally, we present a parameterization of albedo based on days since snowfall and temperature that accounts for 52% of variance in albedo over all three sites and years. Our improved understanding of current controls on snow albedo in the region will allow for better assessment of potential response of seasonal snow albedo and snow cover to changing climate